Clean Water Act discharge permit · NPDES MT0000256
PHILLIPS 66 - BILLINGS REFINERY, Billings, MT: NPDES MT0000256 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 51Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
PHILLIPS 66 - BILLINGS REFINERY, held by PHILLIPS 66 BILLINGS REFINERY, holds NPDES permit MT0000256, which discharges to Yellowstone River. EPA’s file records it issued September 28, 2009 and expiring November 30, 2014. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PHILLIPS 66 - BILLINGS REFINERY |
|---|---|
| Permittee as filed | PHILLIPS 66 BILLINGS REFINERY |
| NPDES ID | MT0000256 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 28, 2009 |
| Expiration date | November 30, 2014 |
| Issuing agency | MONTANA DEQ |
| Address | Billings, MT 59107 |
| Receiving water | YELLOWSTONE RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Yellowstone River-Billings (HUC 100700041006) |
| Other EPA IDs (FRS) | RCRA handler MTD006229405; ICIS-AIR source MT0000003011100011 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 53Pollutants on file
- 51Under a numeric limit
- 18With a violation of any kind
- 9With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH | 12 | 7 | 5 | March 31, 2018 | |
| Solids, total suspended | 20 | 7 | 3 | May 31, 2014 | 84% over the limit |
| Oil and grease | 6 | 3 | 3 | October 31, 2011 | 3,864% over the limit |
| BOD, 5-day, 20 deg. C | 20 | 6 | 2 | May 31, 2007 | 91% over the limit |
| Chlorine, total residual | 10 | 3 | 2 | December 31, 2010 | 700% over the limit |
| Oil & Grease | 2 | 5 | 1 | May 31, 2007 | 52% over the limit |
| Chromium, total [as Cr] | 2 | 5 | 1 | September 30, 2006 | 99,999% over the limit |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 4 | 3 | 1 | June 30, 2007 | |
| Nitrogen, ammonia total [as N] | 24 | 1 | 1 | May 31, 2007 | 32% over the limit |
| Hydrogen sulfide | 6 | 7 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 14 | 4 | 0 | ||
| Flow rate | 9 | 3 | 0 | ||
| Temperature, water deg. centigrade | 0 | 3 | 0 | ||
| Chromium, total recoverable | 18 | 2 | 0 | ||
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 4 | 2 | 0 | ||
| Selenium, total recoverable | 16 | 1 | 0 | ||
| Arsenic, total recoverable | 2 | 1 | 0 | ||
| Duration of discharge | 0 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 20 | 0 | 0 | ||
| Sulfide, total [as S] | 14 | 0 | 0 | ||
| Phenolics, total recoverable | 14 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 8 | 0 | 0 | ||
| Nitrogen, total [as N] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 6 | 0 | 0 | ||
| Sulfide, dissolved, [as S] | 6 | 0 | 0 | ||
| Arsenic, total [as As] | 6 | 0 | 0 | ||
| Chemical Oxygen Demand [COD] | 6 | 0 | 0 | ||
| Oil and grease visual | 6 | 0 | 0 | ||
| Nickel, total recoverable | 5 | 0 | 0 | ||
| Copper, total recoverable | 5 | 0 | 0 | ||
| Mercury, total recoverable | 5 | 0 | 0 | ||
| Chlorine produced oxidants | 4 | 0 | 0 | ||
| Oil and grease, hexane extr method | 3 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 3 | 0 | 0 | ||
| Lead, total recoverable | 3 | 0 | 0 | ||
| Manganese, total recoverable | 3 | 0 | 0 | ||
| Toluene | 3 | 0 | 0 | ||
| Benzene | 3 | 0 | 0 | ||
| Anthracene | 3 | 0 | 0 | ||
| Ethylbenzene | 3 | 0 | 0 | ||
| Phenanthrene | 3 | 0 | 0 | ||
| Tetrachloroethylene | 3 | 0 | 0 | ||
| Benzo[ghi]perylene | 3 | 0 | 0 | ||
| Naphthalene | 3 | 0 | 0 | ||
| p-Xylene | 3 | 0 | 0 | ||
| Phenols | 3 | 0 | 0 | ||
| Styrene | 3 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Thallium, total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Aluminum, dissolved [as Al] | 2 | 0 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 4, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MT0000256 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.